wrap static method
Implementation
static Future<Uint8List> wrap(
List<int> symmetricFileKey, SecretKey derivedKey) async {
final wrappingAlgorithm = Chacha20.poly1305Aead();
final body = await wrappingAlgorithm.encrypt(symmetricFileKey,
secretKey: derivedKey, nonce: List.generate(12, (index) => 0x00));
return body.concatenation(nonce: false);
}